References

Adesoji, F.A. and A.M. Oginni, 2012. Students aptitude indices as predictors of learning outcomes in chemistry. Br. J. Arts Soc. Sci., 8: 174-182.
Direct Link  |  

Adeyemi, T.O., 2008. The influence of class size on the quality of output in secondary schools in Ekiti State, Nigeria. Am. Eurasian J. Sci. Res., 3: 7-14.
CrossRef  |  Direct Link  |  

Ajewole, G.A., 1990. Effects of guided discovery and expository instructional methods on students transfer of learning. J. Sci. Teachers Assoc. Niger., 26: 59-66.

Bosede, A.F., 2010. Influence of sex and location on relationship between student problems and academic performance. The Social Sci., 5: 340-345.
CrossRef  |  Direct Link  |  

Ezeudu, F.O. and N.O. Theresa, 2013. Effect of gender and location on student's achievement in chemistry in secondary schools in Nsukka local governmentarea of Enugu State, Nigeria. Res. Humanities Social Sci., 3: 50-55.

Federal Republic of Nigeria, 2004. National Policy on Education. 4th Edn., NERDC Press, Lagos, Nigeria.

Jack, G.U., 2011. The influence of identified student and school variables on students science process skills acquisition. J. Educ. Pract., 4: 16-23.
Direct Link  |  

Koray, O., M.S. Koksal, M. Ozdemir and A.I. Presley, 2007. The effect of creative and critical thinking based laboratory applications on academic achievement and science process skills. Elementary Educ. Online, 6: 377-389.
Direct Link  |  

Nejla, O., 2013. Exploring effects of high school students mathematical process skills and conceptual understanding of chemical concepts on algorithmic problem solving. J. Res. Educ., 4: 11-14.

Nwana, O.C., 1982. Introduction to Educational Research for Student Teachers. Heinemann Publisher, Ibadan, Nigeria,.

Nworgu, B.G., 2006. Educational Research: Basic Issues and Methodology. 2nd Edn., University of Nigeria, Nsukka, Nigeria,.

Ogunniyi, M.B., 2000. Primary School, Science and Methods. Heinemann Educational Books, Ibadan, Nigeria,.

Oloyede, S.O., 2012. Secondary school students level of understanding of selected chemistry concepts in Osun State, Nigeria. J. Afr. Educ. Res. Network, 6: 32-72.

Oludipe, B.D., 2003. Peer tutoring-assisted instruction: An intervention for increasing senior secondary school students achievement in Physics. Afr. J. Educ. Res., 9: 42-48.

Oyedokun, M.R., 2002. Identification of difficult topics in the senior secondary school certificate biology syllabus as perceived by students. Niger. Teach. Today, 10: 110-120.

Ozgelen, S., 2012. Students’ science process skills within a cognitive domain framework. Eurasia J. Math. Sci. Technol. Educ., 8: 283-292.
CrossRef  |  Direct Link  |  

Sempala, F., 2005. Gender differences in performance of chemistry practical skills among senior six students in Kampala District. Ph.D Thesis, University of Florida, Florida, USA.

Sevilay, K., 2011. Improving the science process skills: Ability of science student teachers using I diagrams. Eurasia J. Phys. Chem. Educ., 3: 26-38.

Tajudeen, C.B., 2005. Enhancing science process skills acquisition in Volumetric analysis using co-operative learning strategy. J. Chem. Panel Workshop, 37: 30-34.

WAEC., 2013. The West African senior school certificate examinations. West Africa Examination Council, Lagos, Nigeria.

Yanper, J., 2007. Teaching Science in the Primary Classroom. 2nd Edn., TJ International, Padstow, England, UK.,.