The aim of the study was to find out the effects of classroom design on student learning in public secondary schools in Embu County, Kenya. Generally, literature seems to show that classroom design reflects the classroom management. Classroom design greatly affects students learning. The effects are both positive and negative. Our teachers need to research and get information immediately they know about the students they have. This is a RA and will be of great advantage to the teachers. This will help them decide on what will work best in the classrooms and what will improve and enhance student learning. Studies show that all things matter and are important and they should be put into considerations. Even those that a teacher views as small things they really matter. For instance, we can talk about the furniture. This can basically include the size of the desk. We can also look at the temperatures in the classroom, where items are placed in the classroom among others. All this affects student learning. The study had objectives which includes how; furniture, temperature, lighting, classroom layout and seating arrangement and color and aesthetic affects student learning in public secondary schools. The study adopted descriptive design method. The target population was 146 public secondary schools in Embu County. Data collection involved questionnaires where the students were issued some questionnaires to fill. Interviews were also used. Data was also collected by using simple random sampling techniques. Findings were represented in form of texts, pie charts, tables and graphs. The study showed that furniture, lighting and temperature ventilations highly affected student learning. The study recommended that the government and the stakeholders should come up with a way to address this issue so that student`s performance can increase.