Improvisation are materials that are used in absent of the original or ideal object to bring about the same learning effect that the standard material would have brought (ahmed 2008). it seems to be the opposite of teaching, which requires proper planning and advance thinking. Moreover, the students of G.S kabarondo B require the improvisation in other to increase performing especial in chemistry due to lack of the laboratory. it is known worldwide that laboratory equipment and teaching-learning material are factor influencing students ‘performance in science especial in chemistry. Franzer et al.(1992) cited that professionally qualified science teacher no matter how well trained, would unable to put his ideas into practice if the school have insufficient of equipment and material necessary for him or her to translate his competence into reality and also TLM are the most important in knowing science in real life. Franzer et al, Abdullah (1982) cited that TLM are materials or tools locally made or imported that could make tremendous enhancement of lesson impact if intelligently used. This means that TLM is the most important in useful in teaching and learning science and they affect students’ performance in sciences permanently. Based on Clegg.et-al.(2008) science education in African countries is at most universally in-adequate. He showed that African has the problem in science especial in RWANDA where the big number of students they don’t liked sciences, this brought the problem of lack of doctors, engineers and researchers.