diff --git a/server/StudySharp.Domain/Repositories/ITheoryBlockRepository.cs b/server/StudySharp.Domain/Repositories/ITheoryBlockRepository.cs
new file mode 100644
index 0000000..85d2dc2
--- /dev/null
+++ b/server/StudySharp.Domain/Repositories/ITheoryBlockRepository.cs
@@ -0,0 +1,16 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using StudySharp.Domain.General;
+using StudySharp.Domain.Models;
+
+namespace StudySharp.Domain.Repositories
+{
+    public interface ITheoryBlockRepository : IRepository
+    {
+        Task<OperationResult<TheoryBlock>> CreateTheoryBlockAsync(TheoryBlock theoryBlock);
+        Task<OperationResult<TheoryBlock>> GetTheoryBlockByIdAsync(int id);
+        Task<OperationResult<List<TheoryBlock>>> GetTheoryBlocksByCourseIdAsync(int courseId);
+        Task<OperationResult<TheoryBlock>> UpdateTheoryBlockAsync(TheoryBlock theoryBlock);
+        Task<OperationResult<TheoryBlock>> RemoveTheoryBlockByIdAsync(int id);
+    }
+}
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diff --git a/server/StudySharp.DomainServices/Repositories/TheoryBlockRepository.cs b/server/StudySharp.DomainServices/Repositories/TheoryBlockRepository.cs
new file mode 100644
index 0000000..442e73b
--- /dev/null
+++ b/server/StudySharp.DomainServices/Repositories/TheoryBlockRepository.cs
@@ -0,0 +1,74 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+using StudySharp.Domain.General;
+using StudySharp.Domain.Models;
+using StudySharp.Domain.Repositories;
+
+namespace StudySharp.DomainServices.Repositories
+{
+    public sealed class TheoryBlockRepository : ITheoryBlockRepository
+    {
+        private readonly StudySharpDbContext _context;
+
+        public TheoryBlockRepository(StudySharpDbContext context)
+        {
+            _context = context;
+        }
+
+        public async Task<OperationResult<TheoryBlock>> CreateTheoryBlockAsync(TheoryBlock theoryBlock)
+        {
+            await _context.TheoryBlocks.AddAsync(theoryBlock);
+            await _context.SaveChangesAsync();
+            return new OperationResult<TheoryBlock> { Result = theoryBlock, IsSucceeded = true };
+        }
+
+        public async Task<OperationResult<TheoryBlock>> GetTheoryBlockByIdAsync(int id)
+        {
+            var theoryBlock = await _context.TheoryBlocks.FindAsync(id);
+            if (theoryBlock == null)
+            {
+                return BuildErrorResponse("Could not find TheoryBlock`s Id");
+            }
+            return new OperationResult<TheoryBlock> { Result = theoryBlock, IsSucceeded = true };
+        }
+
+        public async Task<OperationResult<List<TheoryBlock>>> GetTheoryBlocksByCourseIdAsync(int courseId)
+        {
+            var theoryBlocks = await _context.TheoryBlocks.Where(_ => _.CourseId == courseId).ToListAsync();
+            return new OperationResult<List<TheoryBlock>> { Result = theoryBlocks, IsSucceeded = true };
+        }
+
+        public async Task<OperationResult<TheoryBlock>> UpdateTheoryBlockAsync(TheoryBlock theoryBlock)
+        {
+            if (theoryBlock == null)
+            {
+                return BuildErrorResponse("There`s no TheoryBlock you can modify");
+            }
+            _context.Entry(theoryBlock).State = EntityState.Modified;
+            await _context.SaveChangesAsync();
+            return new OperationResult<TheoryBlock> { Result = theoryBlock, IsSucceeded = true };
+        }
+
+        public async Task<OperationResult<TheoryBlock>> RemoveTheoryBlockByIdAsync(int id)
+        {
+            var theoryBlock = await _context.TheoryBlocks.FindAsync(id);
+            if (theoryBlock == null)
+            {
+                return BuildErrorResponse("Could not find TheoryBlock`s Id");
+            }
+            _context.TheoryBlocks.Remove(theoryBlock);
+            await _context.SaveChangesAsync();
+            return new OperationResult<TheoryBlock> { Result = theoryBlock, IsSucceeded = true };
+        }
+        
+        private OperationResult<TheoryBlock> BuildErrorResponse(string errorText)
+        {
+            var result = new OperationResult<TheoryBlock> { Result = null, IsSucceeded = false };
+            result.Errors.Add(errorText);
+            return result;
+        }
+    }
+}
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