Internet resources are useful for teachers, but few people pay attention to assisting primary mathematics teachers to find relevant resources via Internet. Although a general search engine can help us locate related curriculum resources on the Internet, it is very time-consuming to inspect every possible web sites. The major purpose of this paper is to describe a potential vortal site for helping primary mathematics teachers to search useful teaching resources effectively via linking relevant web sites. This paper attempts to describe the rationales of developing this vortal site. Hence some important principles for designing vortal site are recommended for readers' reference.

對不少小學教師來說，「數型」是一個不容易捉摸的課題。它不像「加」、「減」、「乘」、「除」、或是「四邊形」、「三角形」一樣，有著非學不可的元素一一往後學習數學的預備知識。也就是說，它是學了看不到有何得益，不學又好像並無不妥的課題。因此，它往往不是教師最關心學生表現的一課。這種可有可無的地位，令不少人甚至認為大可把它從課程中刪去。對很多教師而言，學生的學習歷程只是流於背誦公式，掌握不好，亦即背誦不熟，這樣的學習過程亳無意義可言！記得曾經有教師說過，每年面對這課題時，總要重新背誦一遍有關公式，才有信心進入課室。教師尚且如此，何況學生?在新課程之下，數型已由小六的必授部分移至增潤部分 (香港課程發展議會, 2000) 。可以預期，叫苦的大可不教，不然，總得面對如何為這課題定位的問題。本文嘗試為這課題重新定位，透過數學化觀點 (馮，2004) 揭示數學學習之中，以「形」馭「數」的面相。

根據香港課程發展議會 (2000) ，角的學習內容出現於小二和小三。然而，角的概念會延續至往後的學習單元，例如︰方向(由北方順時針轉一個直角，便是東方)、垂直與平行(以直角引入垂直線)、四邊形(藉角的認識探討四邊形的特性)等。因此初小學生必須對角的概念有很好的理解，為日後建構更高層次的幾何概念打好基礎。 數學化教學是重視學理鋪陳的教學法。在設計教學前，教師必須對學理結構有很好的掌握，才能有效地佈置和處理教學上的每一個細節。本文以角的教學為主題，從學理入手，深入地分析由直線衍生的角的定義，並介紹一個適用於小學課堂的教學方案，及其執行時的注意事項。最後會探討在這個方案底下學習的學生，將如何面對測考，期間又會遇上怎樣的困難。

在香港的課室中， 有特殊學習需要的學生日見增多，照顧學生多樣性已成為教育界的重大挑戰。據家長及教師反映，不少有特殊學習需要的學生，學習數學時都遇上困難，其中包括混淆數學概念、不能準確執行計算程序等等。然而，目前一般學校均未能為這些學生提供適當的支援。在過去的十個月，筆者等嘗試從學校課堂、單獨面談及課後支援班三方面探討這些學生的需要，期望從數學專科的角度，解讀他們數學學習困難的成因，及尋找幫助他們的方法。本文總結觀察所得，大膽提出從教學、課程及行政三方面入手，幫助這些學生面對數學學習的方法。

The Hong Kong Special Administrative Government (HKSAR) has been encouraging the teaching professionals at all levels to apply Information Technology (IT) in education. The general public usually connects IT in education with computer-assisted instruction (CAI), computer-assisted learning (CAL), and information search in the internet. In fact, IT can bring in other advantages such as developing a continuous and dynamic approach to educational testing. At present, the common practice of paper-and-pencil testing (P&P) is that all examinees are arranged to receive the same set of test questions at the same time-slot. One of the major shortcomings of this arrangement is that competent examinees may waste time to answer simple questions while low ability examinees may face challenging questions that could destroy their confidence in the subject. This practice is actually against a very basic educational principle: catering for individual needs. With the availability of powerful personal computers and the advancement of psychometric measurement, tailoring tests to individual's ability becomes much easily realized. A system that delivers tailor-made tests for individuals using computer with certain item selection program is called Computerized Adaptive Testing (CAT). As CAT has many advantages over the traditional P&P, it is becoming prevalent in many advanced countries. However, CAT also has shortcomings. For example, it cannot measure certain kinds of mathematics abilities. This paper will describe the general background and the current development of CAT and particularly will discuss in more details the potentials and limits of using CAT for Mathematics assessment.

Mathematics is widely perceived as an abstract subject to learn. However, information technology can be used as a tool for enhancing the students' understanding of the abstract concepts behind and also arousing their interest in learning a variety of topics of mathematics. This paper reports the design and implementation of Java and Flash programs for teaching and learning elementary number theory in the Hong Kong Institute of Education. Illustrative examples with screen dumps for topics such as Greatest Common Divisors, Eratosthenes Sieve, Prime Number Distributions and the Chinese Remainder Theorem will be provided.
[Copyright © 2001 The Association for Advancement of Computing in Education.]

This paper aims to unveil the reasons behind the changes in HK's Mathematics Curriculum in the last two decades. It attempts to find out what actually initiated new Mathematics Syllabuses in HK. Besides literature search on relevant documents, archives and government printings, personal interviews of renowned mathematics educators were also conducted. Seven major motive forces were identified. Their social, economical, political settings and their implications on mathematics education were also discussed.
[Copyright © 2000 The Hong Kong Institute of Education.]

The use of history in mathematics classroom has enormous potential for enlivening both teaching and learning of mathematics. There is a need to promote how to incorporate history of mathematics into the primary mathematics curriculum. This paper discusses the rationales on how to integrate history of mathematics into the primary mathematics curriculum. We also report on how to locate useful and relevant resources in books, journals and the WWW concerning the use of history in mathematics education for primary school teachers in Hong Kong. We hope our findings will prove useful to other educators in the same research area.
[Copyright © 2000 The Hong Kong Institute of Education.]