The study is on the environmental impact of  thermal desorption unit on the physicochemical composition of leachate in Beneku in Ndokwa East Local Government Area, Delta state. Leachates samples were collected from 6 trenches dug into the dumpsites at 1.5m depth. 2-liter plastic containers were used to collect the leachates. Prior to collection, the containers were rinsed with the samples in order to acclimatize to the sample environment. In order to avoid chemical and biological changes that have the potential to change the natural homogeneity of the samples, the sample for heavy metals analysis were preserved by adding 1ml of conc. HNO3 while 2ml Concentrated H2SO4 was added to samples for COD analysis. The average pH values of the leachate for the wet season was 7.4, while in the dry season it was 6.0. With the pH values varying from 6 to 7.4,which is within the limit of the FMEnv of 6.0 – 9.0, it is a representative of a growing pH from young to old leachate. The electrical conductivity for both the wet and dry seasons are 6119.14 μs/cm and 6206.49 μs/cm respectively, which far exceeded the FMENV standard of 125.00 μs/cm. The BOD average values for the wet and dry seasons are 7.30 mg/l and 7.50 mg/l respectively while the average values of COD were 13.78 mg/l and 14.22 mg/l  respectively for the wet and dry seasons. The mean ratio  7.30/13.78 is 0.53 for the wet season and that for the dry season wich is 7.50/14.22 is also 0.53. This figure (0.53) shows that the organic matter in the leachates is readily biodegradable, and has a high organic strength which can be attributed to fact that the study site is active or open, being fed with waste on a continuous basis, which possibly contains organic matter that undergoes biodegradation continually. From the results of the study, the average values of Iron are 249.54 mg/l and 258.88 for the wet and dry seasons respectively and are over the FMEnv limit of 0.05 mg/l, Manganese had 2.89 mg/l and 2.66 mg/l for the wet and dry seasons respectively are were also above the FMEnv limit of 0.05 mg/l, Cadmium concentrations in the leachate were 0.57 mg/l and 0.69 mg/l for the wet and dry seasons respectively and they were above the FMEnv limit of 0.01 mg/l, Chromium recorded an average of 4.36 mg/l and 6.95 mg/l for the wet and dry seasons respectively and were above the FMEnv limit of 0.20 mg/l. Nickel had an average values of 0008 mg/l and 0.006 mg/l and are below the FMEnv limit of 0.01 mg/l, Lead recorded an average of 0.33 mg/l and 0.48 mg/l for the wet and dry seasons respectively and are above the FMEnv limit of 0.05 mg/l. The use of thermal desorption unit as treatment method for contaminated solids has proved to be effective as shown in this study as most of the parameters tested in the leachate were well below the Federal Ministry of Environment set limits.

The integration of Information and Communication Technologies (ICTs) in STEM teaching and learning has become a potent vehicle of effective teaching and learning experiences in the 21st century for both students and teachers in African Digital Schools Initiative (ADSI) in Narok County. The Ministry of Education, Science and Technology (MOEST) has partnered with the Global E-Schools and Communities Initiative (GESCI) because of the crucial need to integrate ICT in STEM teaching. Through ADSI, ICT infrastructure have been provided to some schools and teachers trained on model design and implementation of lesson presentation software, interactive learner-centered pedagogical strategies and collaborative learning tools to address diverse interests and needs of the learners. The study is aimed at exploring the impact of teacher training on the use of ICT tools and the STEM comprehension levels and attitude among the learners. A total of 60 teachers from 20 ADSI schools in Narok county have been purposively sampled for the study. It was found out that the training made teachers resourceful in lesson preparation using ICT tools which resulted in improved learning outcomes and improved quality of STEM teaching. Additionally, the use of ICT instilled 21st century skills on learners as learners were able to interact with ICT tools and led to incorporation of ICT–based teaching and learning. The study recommends MOEST, Kenya Institute of Curriculum Development (KICD) and other Non-Governmental Organizations (NGOs) to step up their efforts in effective training of teachers in ICT, provide adequate ICT infrastructure and set up a framework for the implementation of ICT in teaching and learning in all schools.