Following the integration of the situational approach (APS) in DRC education system, a study was Undertaken in pilot secondary schools in city of MBUJIMAYI. The objectives of this study were to verify compliance with thé standards of this new paradigm among science teachers, to identify the difficulties encountered in the effective implementation of this new reform as well as the methods used by teachers in their teaching - learning. To do this, a CAP survey was carried out among 54 secondary schools teachers, in order to situate them in relation to APS, in particular APS training, the use of the evaluation grid, thé use of the correction grid, the questioning method used in the evaluation of their learners as well as the use of DAS observation grid by their heads of establishment. We were guided in our research by techniques such as analysis, interview and observation. Problem-situations are used by science teachers in the assessment at an insufficient rate (16,5 %, or 205 cases out of 1246 semester exam questions collected and analyzed), while the items were used at 83,5 % (1041 questions out of 1246 collected). More than 75 % of study perfects are notre trained in APS, more than 75 % of science teachers do not provide any methological information on the teaching sheet and use untimed essential knowledge frameworks. Severals efforts remain to be made in order to consolidate this new educational approach.

This work consists in determining the contents of the main nutrients in the maize consumed by the population of Mbujimayi as a staple food, then comparing the nutrients potentialities of the locals varieties with those of the improved varieties, in order to facilitate the consolidation of foot safety in this area-city.With this intention, four locals varieties three improved varieties were weighed in order tout find their respective gravimetric chemical composition, in particular by dessication, incineration and tritimetric dosage of total nitrogen by the KJELDAHL method. The locals and improved maize varieties analyzed respectively showed average water content (12,59 ans 10,62 %), dry matter content (87,46 and 89,36 %), organic matter content (85,73 and 87,56%) and crude protein contents (9,6 and 10,6 %). At the threshold &=5% and degree freedom = 5, the statistical analysis of differents contents gave respective values of F (1,8; 1,8; 5,0; 1,82 and 2,11) lowers than value or tabular F (6,61). The improved varieties of maize do not experience any nutrient superiority in their nutrient contents compared to the locals varieties of this foodstuff.