diff --git a/backend/src/main/java/com/senac/gestaocurso/repository/AulaRepository.java b/backend/src/main/java/com/senac/gestaocurso/repository/AulaRepository.java
index 30c4949..810fb70 100644
--- a/backend/src/main/java/com/senac/gestaocurso/repository/AulaRepository.java
+++ b/backend/src/main/java/com/senac/gestaocurso/repository/AulaRepository.java
@@ -5,6 +5,12 @@
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
+import java.time.LocalDate;
+
 @Repository
 public interface AulaRepository extends JpaRepository<Aula, Long>, CustomQuerydslPredicateExecutor<Aula> {
+
+    Aula findByMateria(Long idMateria);
+    Aula findByDia(LocalDate dia);
+    Aula findByProfessor(Long idProfessor);
 }
diff --git a/backend/src/main/java/com/senac/gestaocurso/service/AulaService.java b/backend/src/main/java/com/senac/gestaocurso/service/AulaService.java
index 6bd069c..b8181a8 100644
--- a/backend/src/main/java/com/senac/gestaocurso/service/AulaService.java
+++ b/backend/src/main/java/com/senac/gestaocurso/service/AulaService.java
@@ -2,6 +2,7 @@
 
 import com.senac.gestaocurso.models.domain.Aula;
 import com.senac.gestaocurso.repository.AulaRepository;
+import com.senac.gestaocurso.strategy.NovaValidacaoAulaStrategy;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
@@ -13,14 +14,24 @@ public class AulaService {
 
     @Autowired
     private AulaRepository aulaRepository;
-    public Aula salvar(Aula entity) {return aulaRepository.save(entity);}
-    public Page<Aula> buscaTodos(Pageable pageable) {
+
+    @Autowired
+    private List<NovaValidacaoAulaStrategy> novaValidacaoAulaStrategies;
+
+    public Aula salvar(Aula entity){
+        novaValidacaoAulaStrategies.forEach(validar -> validar.validar(entity));
+        return aulaRepository.save(entity);
+    }
+
+    public Page<Aula> buscaTodos(Pageable pageable){
         return aulaRepository.findAll(pageable);
     }
-    public Aula buscaPorId(Long id) {
+
+    public Aula buscaPorId(Long id){
         return aulaRepository.findById(id).orElse(null);
     }
-    public Aula alterar(Long id, Aula alterado) {
+
+    public Aula alterar(Long id, Aula alterado){
         Optional<Aula> encontrado = aulaRepository.findById(id);
         if ((encontrado.isPresent())) {
             Aula aula = encontrado.get();
@@ -28,8 +39,10 @@ public Aula alterar(Long id, Aula alterado) {
             aula.setDia(alterado.getDia());
             return aulaRepository.save(aula);
         }
+
         return null;
     }
+
     public void remover(Long id) {aulaRepository.deleteById(id);
     }
 }
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/NovaValidacaoAulaStrategy.java b/backend/src/main/java/com/senac/gestaocurso/strategy/NovaValidacaoAulaStrategy.java
new file mode 100644
index 0000000..9f42320
--- /dev/null
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/NovaValidacaoAulaStrategy.java
@@ -0,0 +1,8 @@
+package com.senac.gestaocurso.strategy;
+
+import com.senac.gestaocurso.models.Aula;
+
+public interface NovaValidacaoAulaStrategy {
+
+    void validar(Aula aula);
+}
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/aulaValidacaoImp/ValidarMateriaDoProfessorPorDia.java b/backend/src/main/java/com/senac/gestaocurso/strategy/aulaValidacaoImp/ValidarMateriaDoProfessorPorDia.java
new file mode 100644
index 0000000..af1af5a
--- /dev/null
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/aulaValidacaoImp/ValidarMateriaDoProfessorPorDia.java
@@ -0,0 +1,27 @@
+package com.senac.gestaocurso.strategy.aulaValidacaoImp;
+
+import com.senac.gestaocurso.enterprise.ValidationException;
+import com.senac.gestaocurso.models.Aula;
+import com.senac.gestaocurso.repository.AulaRepository;
+import com.senac.gestaocurso.strategy.NovaValidacaoAulaStrategy;
+import org.springframework.beans.factory.annotation.Autowired;
+
+import java.time.LocalDate;
+
+public class ValidarMateriaDoProfessorPorDia implements NovaValidacaoAulaStrategy {
+
+    @Autowired
+    private AulaRepository repository;
+
+    @Override
+    public void validar(Aula aula) {
+        if (validaMateriaPorDia(aula.getDia(), aula.getProfessor().getId())){
+            throw new ValidationException("Esse professor já está com aula neste dia");
+        }
+    }
+
+    private boolean validaMateriaPorDia(LocalDate dia, Long idProfessor){
+        return repository.findByDia(dia) != null &&
+                repository.findByProfessor(idProfessor) != null;
+    }
+}
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarListaCertificacoes.java b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ImplementaListaCertificacao.java
similarity index 65%
rename from backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarListaCertificacoes.java
rename to backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ImplementaListaCertificacao.java
index c7f35e8..56a735c 100644
--- a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarListaCertificacoes.java
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ImplementaListaCertificacao.java
@@ -1,4 +1,4 @@
-package com.senac.gestaocurso.strategy.impl;
+package com.senac.gestaocurso.strategy.funcionarioValidacaoImp;
 
 import com.senac.gestaocurso.models.domain.Certificacao;
 import com.senac.gestaocurso.models.Funcionario;
@@ -9,11 +9,11 @@
 import java.util.stream.Collectors;
 
 @Component
-public class ValidarListaCertificacoes implements ValidarImplementacaoListasStrategy {
+public class ImplementaListaCertificacao implements ValidarImplementacaoListasStrategy {
     @Override
     public void lista(Funcionario funcionario) {
-        if (!funcionario.getCertificacoes().isEmpty()) {
-            List<Certificacao> certificacaoList = funcionario.getCertificacoes()
+        if (validaLista(funcionario)) {
+            List<Certificacoes> certificacoesList = funcionario.getCertificacoes()
                     .stream()
                     .map(certificacoesIn -> new Certificacao(
                             certificacoesIn.getNome(),
@@ -25,4 +25,10 @@ public void lista(Funcionario funcionario) {
             funcionario.setCertificacoes(certificacaoList);
         }
     }
+
+    private Boolean validaLista(Funcionario funcionario){
+        if (!funcionario.getCertificacoes().isEmpty()) return true;
+
+        return false;
+    }
 }
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarListaDadosBancarios.java b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ImplementaListaDadoBancario.java
similarity index 66%
rename from backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarListaDadosBancarios.java
rename to backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ImplementaListaDadoBancario.java
index 4b154a7..f2490a3 100644
--- a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarListaDadosBancarios.java
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ImplementaListaDadoBancario.java
@@ -1,4 +1,4 @@
-package com.senac.gestaocurso.strategy.impl;
+package com.senac.gestaocurso.strategy.funcionarioValidacaoImp;
 
 import com.senac.gestaocurso.models.DadosBancario;
 import com.senac.gestaocurso.models.Funcionario;
@@ -9,11 +9,11 @@
 import java.util.stream.Collectors;
 
 @Component
-public class ValidarListaDadosBancarios implements ValidarImplementacaoListasStrategy {
+public class ImplementaListaDadoBancario implements ValidarImplementacaoListasStrategy {
     @Override
     public void lista(Funcionario funcionario) {
-        if (!funcionario.getDadosBancarios().isEmpty()) {
-            List<DadosBancario> dadosBancarioList = funcionario.getDadosBancarios()
+        if (validaLista(funcionario)) {
+            List<DadosBancarios> dadosBancariosList = funcionario.getDadosBancarios()
                     .stream()
                     .map(dadosBancariosIn -> new DadosBancario(
                             dadosBancariosIn.getBanco(),
@@ -26,4 +26,10 @@ public void lista(Funcionario funcionario) {
             funcionario.setDadosBancarios(dadosBancarioList);
         }
     }
+
+    private boolean validaLista(Funcionario funcionario){
+        if (!funcionario.getDadosBancarios().isEmpty()) return true;
+
+        return false;
+    }
 }
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarListaDependentes.java b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ImplementaListaDependente.java
similarity index 64%
rename from backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarListaDependentes.java
rename to backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ImplementaListaDependente.java
index 0fe4344..7e35893 100644
--- a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarListaDependentes.java
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ImplementaListaDependente.java
@@ -1,4 +1,4 @@
-package com.senac.gestaocurso.strategy.impl;
+package com.senac.gestaocurso.strategy.funcionarioValidacaoImp;
 
 import com.senac.gestaocurso.models.Dependente;
 import com.senac.gestaocurso.models.Funcionario;
@@ -9,13 +9,13 @@
 import java.util.stream.Collectors;
 
 @Component
-public class ValidarListaDependentes implements ValidarImplementacaoListasStrategy {
+public class ImplementaListaDependente implements ValidarImplementacaoListasStrategy {
 
 
     @Override
     public void lista(Funcionario funcionario) {
-     if (!funcionario.getDependentes().isEmpty()){
-         List<Dependente> dependenteList = funcionario.getDependentes()
+     if (validaLista(funcionario)){
+         List<Dependentes> dependentesList = funcionario.getDependentes()
                  .stream()
                  .map(dependentesIn -> new Dependente(
                          dependentesIn.getNome(),
@@ -27,4 +27,10 @@ public void lista(Funcionario funcionario) {
          funcionario.setDependentes(dependenteList);
      }
     }
+
+    private boolean validaLista(Funcionario funcionario){
+        if (!funcionario.getDependentes().isEmpty()) return true;
+
+        return false;
+    }
 }
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarListaExpAnterior.java b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ImplementaListaExperienciaAnterior.java
similarity index 66%
rename from backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarListaExpAnterior.java
rename to backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ImplementaListaExperienciaAnterior.java
index c9d3e6b..50edad2 100644
--- a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarListaExpAnterior.java
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ImplementaListaExperienciaAnterior.java
@@ -1,4 +1,4 @@
-package com.senac.gestaocurso.strategy.impl;
+package com.senac.gestaocurso.strategy.funcionarioValidacaoImp;
 
 import com.senac.gestaocurso.models.ExperienciaAnterior;
 import com.senac.gestaocurso.models.Funcionario;
@@ -9,11 +9,11 @@
 import java.util.stream.Collectors;
 
 @Component
-public class ValidarListaExpAnterior implements ValidarImplementacaoListasStrategy {
+public class ImplementaListaExperienciaAnterior implements ValidarImplementacaoListasStrategy {
     @Override
     public void lista(Funcionario funcionario) {
-        if (!funcionario.getExpAnterior().isEmpty()) {
-            List<ExperienciaAnterior> experienciaAnteriorList = funcionario.getExpAnterior()
+        if (validaLista(funcionario)) {
+            List<ExpAnterior> expAnteriorList = funcionario.getExpAnterior()
                     .stream()
                     .map(expAnteriorIn -> new ExperienciaAnterior(
                             expAnteriorIn.getDescricao(),
@@ -26,4 +26,10 @@ public void lista(Funcionario funcionario) {
             funcionario.setExpAnterior(experienciaAnteriorList);
         }
     }
+
+    private boolean validaLista(Funcionario funcionario){
+        if (!funcionario.getExpAnterior().isEmpty()) return true;
+
+        return false;
+    }
 }
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarCnh.java b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarCnh.java
similarity index 92%
rename from backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarCnh.java
rename to backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarCnh.java
index 9231f7c..8578c46 100644
--- a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarCnh.java
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarCnh.java
@@ -1,4 +1,4 @@
-package com.senac.gestaocurso.strategy.impl;
+package com.senac.gestaocurso.strategy.funcionarioValidacaoImp;
 
 import com.senac.gestaocurso.enterprise.ValidationException;
 import com.senac.gestaocurso.models.Funcionario;
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarCpf.java b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarCpf.java
similarity index 92%
rename from backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarCpf.java
rename to backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarCpf.java
index a9c93ba..69922b4 100644
--- a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarCpf.java
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarCpf.java
@@ -1,4 +1,4 @@
-package com.senac.gestaocurso.strategy.impl;
+package com.senac.gestaocurso.strategy.funcionarioValidacaoImp;
 
 import com.senac.gestaocurso.enterprise.ValidationException;
 import com.senac.gestaocurso.models.Funcionario;
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarCtbs.java b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarCtbs.java
similarity index 92%
rename from backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarCtbs.java
rename to backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarCtbs.java
index 42c7b24..c55c962 100644
--- a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarCtbs.java
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarCtbs.java
@@ -1,4 +1,4 @@
-package com.senac.gestaocurso.strategy.impl;
+package com.senac.gestaocurso.strategy.funcionarioValidacaoImp;
 
 import com.senac.gestaocurso.enterprise.ValidationException;
 import com.senac.gestaocurso.models.Funcionario;
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarEmail.java b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarEmail.java
similarity index 92%
rename from backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarEmail.java
rename to backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarEmail.java
index 9e3db94..b59cdd7 100644
--- a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarEmail.java
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarEmail.java
@@ -1,4 +1,4 @@
-package com.senac.gestaocurso.strategy.impl;
+package com.senac.gestaocurso.strategy.funcionarioValidacaoImp;
 
 import com.senac.gestaocurso.enterprise.ValidationException;
 import com.senac.gestaocurso.models.Funcionario;
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarMatricula.java b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarMatricula.java
similarity index 92%
rename from backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarMatricula.java
rename to backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarMatricula.java
index 272bc63..4debdf0 100644
--- a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarMatricula.java
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarMatricula.java
@@ -1,4 +1,4 @@
-package com.senac.gestaocurso.strategy.impl;
+package com.senac.gestaocurso.strategy.funcionarioValidacaoImp;
 
 import com.senac.gestaocurso.enterprise.ValidationException;
 import com.senac.gestaocurso.models.Funcionario;
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarPisPasep.java b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarPisPasep.java
similarity index 92%
rename from backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarPisPasep.java
rename to backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarPisPasep.java
index 1dda63b..91ce61a 100644
--- a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarPisPasep.java
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarPisPasep.java
@@ -1,4 +1,4 @@
-package com.senac.gestaocurso.strategy.impl;
+package com.senac.gestaocurso.strategy.funcionarioValidacaoImp;
 
 import com.senac.gestaocurso.enterprise.ValidationException;
 import com.senac.gestaocurso.models.Funcionario;
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValdiarReservista.java b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarReservista.java
similarity index 86%
rename from backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValdiarReservista.java
rename to backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarReservista.java
index 478e329..a13a01e 100644
--- a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValdiarReservista.java
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarReservista.java
@@ -1,4 +1,4 @@
-package com.senac.gestaocurso.strategy.impl;
+package com.senac.gestaocurso.strategy.funcionarioValidacaoImp;
 
 import com.senac.gestaocurso.enterprise.ValidationException;
 import com.senac.gestaocurso.models.Funcionario;
@@ -8,7 +8,7 @@
 import org.springframework.stereotype.Component;
 
 @Component
-public class ValdiarReservista implements NovaValidacaoFuncionarioStrategy {
+public class ValidarReservista implements NovaValidacaoFuncionarioStrategy {
 
     @Autowired
     private FuncionarioRepository repository;
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarRg.java b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarRg.java
similarity index 92%
rename from backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarRg.java
rename to backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarRg.java
index 197e88a..bbfbf95 100644
--- a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarRg.java
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarRg.java
@@ -1,4 +1,4 @@
-package com.senac.gestaocurso.strategy.impl;
+package com.senac.gestaocurso.strategy.funcionarioValidacaoImp;
 
 import com.senac.gestaocurso.enterprise.ValidationException;
 import com.senac.gestaocurso.models.Funcionario;
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarTelefone.java b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarTelefone.java
similarity index 92%
rename from backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarTelefone.java
rename to backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarTelefone.java
index 7b866f7..764e748 100644
--- a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarTelefone.java
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarTelefone.java
@@ -1,4 +1,4 @@
-package com.senac.gestaocurso.strategy.impl;
+package com.senac.gestaocurso.strategy.funcionarioValidacaoImp;
 
 import com.senac.gestaocurso.enterprise.ValidationException;
 import com.senac.gestaocurso.models.Funcionario;
diff --git a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarTituloEleitor.java b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarTituloEleitor.java
similarity index 93%
rename from backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarTituloEleitor.java
rename to backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarTituloEleitor.java
index 80869ca..2852a27 100644
--- a/backend/src/main/java/com/senac/gestaocurso/strategy/impl/ValidarTituloEleitor.java
+++ b/backend/src/main/java/com/senac/gestaocurso/strategy/funcionarioValidacaoImp/ValidarTituloEleitor.java
@@ -1,4 +1,4 @@
-package com.senac.gestaocurso.strategy.impl;
+package com.senac.gestaocurso.strategy.funcionarioValidacaoImp;
 
 import com.senac.gestaocurso.enterprise.ValidationException;
 import com.senac.gestaocurso.models.Funcionario;