重上“江湖”

几个月前朋友向我介绍了“无极江湖”,这是个不错的聊天室(网址是http://hoho.cc)。可是自从它改版之后,我却无法进入聊天室了。我十分纳闷,难道是因为改版?可别人都可以进去。我杀了一遍毒,什么病毒也没查出。重装一遍Win98,但是重启后故障照旧。也许是Win98的问题?我又安装了WinXP,可结果还是一样。我苦思冥想也没想出个所以然来。后来又猜测会不会是浏览器软件有问题?我重装了IE6和IE6 SP1补丁也无济于事。还有什么与网页有关系呢?对了,也许是《金山毒霸2003》!它有一个网页防火墙,如果禁用它……果不出我所料,退出《金山毒霸2003》…     

Exploring How Different Features of Animations of Sodium Chloride Dissolution Affect Students’ Explanations

Animations of molecular structure and dynamics are often used to help students understand the abstract ideas of chemistry. This qualitative study investigated how the features of two different styles of molecular-level animation affected students’ explanations of how sodium chloride dissolves in water. In small group sessions 18 college-level general chemistry students dissolved table salt in water, after which they individually viewed two animations of salt dissolution. Before and after viewing each animation the participants provided pictorial, written, and oral explanations of the process at the macroscopic and molecular levels. The students then discussed the animations as a group. An analysis of the data showed that students incorporated some of the microscopic structural and functional features from the animations into their explanations. However, oral explanations revealed that in many cases, participants who drew or wrote correct explanations did not comprehend their meanings. Students’ drawings may have reflected only what they had seen, rather than a cohesive understanding. Students’ explanations given after viewing the animations improved, but some prior misconceptions were retained and in some cases, new misconceptions appeared. Students reported that they found the animations useful in learning; however, they sometimes missed essential features when they watched the animation alone.     

Considerations in Assessment of Children with Severe Disabilities including Deaf‐Blindness and Autism

This paper will discuss the difficulties in assessment of autistic and deaf‐blind children with such severe difficulties in communication that they are often labelled as untestable and subsequently misdiagnosed as severely to profoundly mentally retarded. It will go on to make the case for nonintrusive assessment and appropriate intervention as the most relevant procedures for helping this population advance educationally and in life skills. While this paper will focus on children, the points made apply to individuals of all ages.